Actually Deaf people have campaigned against a proposal to ban the selection of embryos based on a preference to have a Deaf child, because they wanted to be able to choose to have a Deaf child. http://news.bbc.co.uk/1/hi/health/7287508.stm
The campaign was unsuccessful. UK law now says that:
(9)Persons or embryos that are known to have a gene, chromosome or mitochondrion abnormality involving a significant risk that a person with the abnormality will have or develop—
(a)a serious physical or mental disability,
(b)a serious illness, or
(c)any other serious medical condition,
must not be preferred to those that are not known to have such an abnormality.